VDD

VS

UCC28710

CBC

GND

HV

DRV

CS

UDG-12200

UCC28710, UCC28711

UCC28712, UCC28713

UCC28714, UCC28715

www.ti.com

SLUSB86 – NOVEMBER 2012

Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

Check for Samples: UCC28710, UCC28711, UCC28712, UCC28713, UCC28714, UCC28715

1

FEATURES

APPLICATIONS

•

< 10-mW No-Load Power

•

USB-Compliant Adapters and Chargers for

Consumer Electronics

•

Primary-Side Regulation (PSR) Eliminates

Opto-Coupler

–

Smart phones

•

±5% Voltage and Current Regulation Across

–

Tablet computers

Line and Load

–

Cameras

•

700-V Start-Up Switch

•

Standby Supply for TV and Desktop

•

100-kHz Maximum Switching Frequency

•

White Goods

Enables High-Power Density Charger Designs

•

Quasi-Resonant Valley-Switching Operation

DESCRIPTION

for Highest Overall Efficiency

The UCC28710 family of flyback power supply

controllers provides isolated-output Constant-Voltage

•

Frequency Jitter to Ease EMI Compliance

(CV) and Constant-Current (CC) output regulation

•

Wide VDD Range Allows Small Bias Capacitor

without the use of an optical coupler. The devices

•

Clamped Gate-Drive Output for MOSFET

process information from the primary power switch

and an auxiliary flyback winding for precise control of

•

Overvoltage, Low-Line, and Overcurrent

output voltage and current.

Protection Functions

•

Programmable Cable Compensation

An

internal

700-V

start-up

switch,

dynamically-

controlled operating states and a tailored modulation

(UCC28710, UCC28714 and UCC28715)

profile

support

ultra-low

standby

power

without

•

NTC Resistor Interface (UCC28711, UCC28712

sacrificing start-up time or output transient response.

and UCC28713) with Fixed Cable

Compensation Options

Control algorithms in the UCC28710 family allow

operating efficiencies to meet or exceed applicable

•

SOIC-7 Package

standards. The output drive interfaces to a MOSFET

power switch. Discontinuous conduction mode (DCM)

SIMPLIFIED APPLICATION

with

valley

switching

reduces

switching

losses.

Modulation

of

switching

frequency

and

primary

current peak amplitude (FM and AM) keeps the

conversion efficiency high across the entire load and

line ranges.

The controllers have a maximum switching frequency

of 100 kHz and always maintain control of the peak-

primary current in the transformer. Protection features

help

keep

primary

and

secondary

component

stresses in check. The UCC28710, UCC28714 and

UCC28715 allow the cable compensation to be

programmed.

The

UCC28711,

UCC28712

and

UCC28713

devices

allow

remote

temperature

sensing using a negative temperature coefficient

(NTC)

resistor

while

providing

fixed

cable-

compensation levels.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.